Sewing-machine



LIE. WEAVER. sewme MACHINE SHUTTLE.

APPLICATION FILED NOV. 5. I918 1,326,625. Patented Dec. 30,1919.

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L UCIUS EIDVIABD WEAVER, OF EAST HAMPTQN, QGN'NECTIGUT, ASSIGNGIib TU THEOP I'IILUS KING, OF BOE'IUN, M. SSACIFUSE'ZTE.

SEWING VLACHINE SHUTTLE Specification of Letters Patent.

Patented '3, so.

Application filed Novemhcrlfi, 1918. Eerie]. No. 62,705.

at East Hampton, in the county of Middlescx and State of Connecticut, have invented new and useful Improvements 1n SGW111gli lachine Shuttles, of which the'l ollowing is a specification.

This invention relates to a sewing-machine shuttle which includes a shuttle body movable in a predetermined path, and a bobbin case suitably connected with the body and adapted to contain a bobbin which is rotatable in the bobbin. case.

'lihe invention has for itsobject to provide a bobbin case with improved means for frictionally retarding the rotation oi the bobbin therein to prevent undesirable free rotation of the bobbin and a loose accumulation of thread in the bobbin case, said means being adapted to be compactly stored in the bobbin case, without encroaching objectionably on the space occupied by the bobbin, so that the axiallength of the bobbin and the thread-storing capacity thereof are not necessarily reduced in consequence of the employment of said frictional retarding means.

The invention is embodied in the improvements which I will now proceed to describe and claim.

Of the accompanying; drawings forming a partof this specification,---

Figure 1 is a plan View of a bobbin case embodying the invention.

Fig. '2 is a section on line 2-2 of Fig. 1.

Fig. 3 is a sectional view of bobbin. adapted for use with the improved bobbin case.

Fig. which the bobbin case forms a part.

Fig. 5 is a section on line 5 of Fig. *l.

The same reference characters indicate the same parts in all of the figures.

The bobbin case in which my invention is embodied includes a head 12 and a cylindri'oal wall 13. said head and wall forming; a bobbin chamber which is open at one end. The case also includes a tubular post 14 attached to or formed integral with the head and coaxial with the wall 13, said post forming a bearing'on which a bobbin. such as that shown by Fig. 8 is adapted to rotate.

The bobbin case detachably engaged with a shuttle body 15, in anysuitable way.

4 is a top plan view of a shuttle, of

As here shown, the shuttle body is or the Singer central bobbin type, and is provided with a stud 16 formed to pass through the post 14:, the latter being tubular. Gne end of the stud 16' is provided with a groove 17, adapted to be engaged by a locking-slide 18 which is movable on the head 12, means being provided for yieldingly holding the slide 18 111 its locking position, and for dis placing the slide to permit the withdrawal of the'stud 1.6 from the post 14.

The construction thus far described is well known and in common "use.

In carrying out the invention... 1 provide the post is with an enlargement 19 termi hating in a shoulder 20 facing the head 12 and spaced therefrom by a portion of the post which has not been enlarged. Said enlargement is formed by brazing or otherwise securing a sleeve to a portion of the periphery of the post 1e as formed heretofore.

21 represents an annular shoe movable on the portion of the post between the head 15. and shoulder 20, said shoe being prefer ably a flat-sided annular disk or washer, the

central opening of which is formed to permit free movement of the shoe on the said portion of the post. the diamctr" ,0" said opening}; being less than that of the enlarge ment l9.

22 represents a spring interposed between the head 12 and shoe 21, said spring normally holding the shoe against the shoulder 20, and permitting the displacement I of the shoe from its normal position by bobbin applied to the post. The shoe .21 and the spring 22 are inserted in the bobbin case before the application of the-enlargement 19 to the post The bobbin shown separately by Fig. 3, includes a paper cop-tube and. a wind ing 24 of thread thereon. The axial length of the bobbin is such that when the bobbin case and body are connected. as shown by Fig. 5, the shoe 2 1 is displaced from its nor.- mal position by one end of the bobbin. so that the shoe is in yielding frictional contact with one end. of the bobbin and holds the opposite end in frictional contact with a portion of the body The shoe and the shuttle body, therefore, friotionally retard. the rotation of the bobbin and prevent the detachment of loose coils of thread therefrom.

The spring is preferably of combined spimi and. helical form, and prochlooci by winding WiIG 01": which it is composed ri'oumi 2L i'ixod point or center, the Wire con- Einualiy recoding mom tho (some); and. the stress of the spring heiug s rt-sci to hold its oentmi coiivohition ahovo its outer convolution. fh'e convohltions of the spring are, therefore, ac'iopied to bear simuita neousiy on the head 12 when the spring is fully oomprosseci, so that the shoe and spring are mhiptod 20 be compactly stored in the hobhm oaso and do not occupy sufficient room. to require. any n'mtoriai ooh.- tmotion of 11, bobhin.

The shonidor 90 and 7 opening in the shoe Zioonstitut-o comple mental stop members alnptod to limit tho outward movement of the shoe, :21, and provont removal of this shoo and spring from the bobbin It will b: m1 'lhofa pro. ision. is made for convm'iientiy flSSQlDbiil'ig the parts which in (hid-s the hobbii (use 13, the spying 22 the shoe. )1, ail i the enlmfgon'ient or sioove 1? in saoh manner io permit it limited move ment of the spring and shoe, and positively prevent their romomi from the case. In proooioo the spring dropped loosely to place 011 the case howl 115510, shoe is than the nmrgin of tho dropped looseiy to place he the enlargement or sleeve 1.9 4 cured rigidly so iiho iuimim:

1 claim: in a shuttle of the Cilflliwbvl, boilin case comp cal wall forming is closed at one 0116. by said open at the other and, and a fixed Lo the case said wall, a spi'in an annular shoo post in spring, and uoyiindrimi sieovo ruched to the post and forming a on, s bearing and a post onhii'gmnont, tho

enci of said sleeve being spas-e5. in?

said sloovo hsii. who post after and shoe in. the case secure the shoe unci- In testimony Whosigma/curs. 

